ARM: dts: msm: Add pm-qos-latency and update GPU SVS frequency for msm8939

Some targets have different latency requirements to allow various
low latency PC modes. Allow the CPU latency vote to be programmable
for msm8939. 701us PM QOS allows the A7 targets select low Power Mode
which is better in terms of power. This will help save static leakage
of A7 during graphics use cases.
SVS GPU frequency is changed to 220MHz from 200. This is w.r.t to change
in clock plan.

Change-Id: Ied6fb5a11f731604ed4cc4962627d01cd8be5d16
Signed-off-by: Ananta Kishore K <akollipa@codeaurora.org>